单片机

than one meter. In recent years, water meter is arranged on the indoor and caused many problems cause the attention of people increasingly: Home meter reading disturbs people 39。 s normal life and

circuit to generate sine vibration, to obtain the necessary frequency. But can also Synthesis technology to obtain the necessary 9 rate. Frequency of use of technology into the signal generator,

, is it should take place unnecessary change for low pin to make regularly, so, should resume the state. of all pins immediately after being restored to the throne. There are 2 kinds of methods : ①

e 1 storing device temporarilies of 8, storing device 2 temporarily, 839。 s accumulation device ACC, register B and procedure state register PSW, etc. Person who accumulate ACC count by 2 input ends

the cycle following the one in which the transition was detected. Since two machine cycles (24 oscillator periods) are required to recognize a 1to0 transition, the maximum count rate is 1/24 of the

has got better result in the agricultural voltage transformer prehensive protector experiment. Now take 51 serial onechip puters as an example and probe into the concrete principle and implementation

operate instructions to control I/O pins for generating PWM output signals, so that CPU can not do anything other. Therefore, the method also has been discarded gradually. (3) Generated by ASIC. The

1、1基于单片机的数字温度计摘要：本文介绍一种基于 片机的一种温度测量及报警电路,该电路采用 为温度监测元件，测量范围+125，使用 4 位 块显示，能通过键盘设置温度报警上下限。 正文着重给出了软硬件系统的各部分电路，介绍了集成温度传感器 原理，片机功能和应用。 该电路设计新颖、功能强大、结构简单。 关键词：温度测量， of a CU a 55-+125,of ED be on a be

关标 B=1光标闪烁； B=0 光标不显闪烁 0 0 0 0 0 1 N S N=1当读写一个字条款后地址指针加一，且光 标 加一。 N=0当读或写一个字符后地址指针减一，且光标减一。 S=1当写一个安条款，整屏显示左移（ N=1） 或右移（ N=0），以得到光标不移动而屏幕移动的效果。 S=0当写一个字符，整屏显示不移动。 第 页 10 数据控制 指令码 功 能 80H+地址码（ 027H，

tion continued to increase. This was achieved by shrinking the original transistors so that more could be put on a chip. Moreover, the laws of physics were on the side of the manufacturers. The